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  • Open Access

    ARTICLE

    Dihydroartemisinin ameliorates palmitate-induced apoptosis in cardiomyocytes via regulation on miR-133b/Sirt1 axis

    LONGJU QI1,2,#, XIAOYING XU3,#, BIN LI4,#, BO CHANG5, SHENGCUN WANG2, CHUN LIU2, LIUCHENG WU2, XIAODI ZHOU4, QINGHUA WANG2,*

    BIOCELL, Vol.46, No.4, pp. 989-998, 2022, DOI:10.32604/biocell.2022.018014 - 15 December 2021

    Abstract Excessive fat ectopically deposited in the non-adipose tissues is considered as one of the leading causes of myopathy. The aim of this study was to investigate the role of Dihydroartemisinin (DHA) in palmitate (PAL)-incubated H9c2 cells (lipotoxicity-induced cell injury model). Cell viability of PAL-treated cells was determined by MTT assay, and apoptotic regulators were examined by qRT-PCR and western blot analysis, in the absence or in the presence of DHA, respectively. Expression levels of miR-133b and Sirt1 were also evaluated by qRT-PCR and western blotting examination. PAL decreased the viability of H9c2 cells and enhanced More >

  • Open Access

    ARTICLE

    Acoustic Properties of Micro-Perforated Panels Made from Oil Palm Empty Fruit Bunch Fiber Reinforced Polylactic Acid

    Vignesh Sekar1,*, Se Yong Eh Noum1, Azma Putra2, Sivakumar Sivanesan1, Kok Chun Chin1, Yi San Wong1, Dg Hafizah Kassim3

    Sound & Vibration, Vol.55, No.4, pp. 343-352, 2021, DOI:10.32604/sv.2021.014916 - 18 October 2021

    Abstract This paper presents the development and performance of micro-perforated panels (MPP) from natural fiber reinforced composites. The MPP is made of Polylactic Acid (PLA) reinforced with Oil Palm Empty Fruit Bunch Fiber (OPEFBF). The investigation was made by varying the fiber density, air gap, and perforation ratio to observe the effect on the Sound Absorption Coefficient (SAC) through the experiment in an impedance tube. It is found that the peak level of SAC is not affected, but the peak frequency shifts to lower frequency when the fiber density is increased. This phenomenon might be due More >

  • Open Access

    ARTICLE

    Intelligent IoT-Aided Early Sound Detection of Red Palm Weevils

    Mohamed Esmail Karar1,2, Omar Reyad1,3,*, Abdel-Haleem Abdel-Aty4, Saud Owyed5, Mohd F. Hassan6

    CMC-Computers, Materials & Continua, Vol.69, No.3, pp. 4095-4111, 2021, DOI:10.32604/cmc.2021.019059 - 24 August 2021

    Abstract Smart precision agriculture utilizes modern information and wireless communication technologies to achieve challenging agricultural processes. Therefore, Internet of Things (IoT) technology can be applied to monitor and detect harmful insect pests such as red palm weevils (RPWs) in the farms of date palm trees. In this paper, we propose a new IoT-based framework for early sound detection of RPWs using fine-tuned transfer learning classifier, namely InceptionResNet-V2. The sound sensors, namely TreeVibes devices are carefully mounted on each palm trunk to setup wireless sensor networks in the farm. Palm trees are labeled based on the sensor… More >

  • Open Access

    ARTICLE

    Structure, Dynamic-Mechanical and Acoustic Properties of Oil Palm Trunk Modified by Melamine Formaldehyde

    Tetti Novalina Manik1,2,*, Sulung Apria Nuki2, Nur Aini Fauziyah1, Mashuri1, Mochamad Zainuri1, Darminto1,*

    Journal of Renewable Materials, Vol.9, No.9, pp. 1647-1660, 2021, DOI:10.32604/jrm.2021.016089 - 23 April 2021

    Abstract The performance of oil palm trunk wastes from Banjarbaru of South Kalimantan was improved with the help of chemical modification in a two-step treatment. The first was formalization with formaldehyde solution with varying pH, and the second was impregnation with melamine-formaldehyde resin under 5 bar pressure for an hour. In these processes, the samples were cured at 120°C for 10 min and then dried in an oven at (103 ± 2)°C in order to attain a moisture content of less than 6%. These treatments improved the physical properties (density, moisture content, and volume swelling), mechanical More > Graphic Abstract

    Structure, Dynamic-Mechanical and Acoustic Properties of Oil Palm Trunk Modified by Melamine Formaldehyde

  • Open Access

    ARTICLE

    Fiber Loading of Date Palm and Kenaf Reinforced Epoxy Composites: Tensile, Impact and Morphological Properties

    Syed Waheedullah Ghori1,*, G. Srinivasa Rao2

    Journal of Renewable Materials, Vol.9, No.7, pp. 1283-1292, 2021, DOI:10.32604/jrm.2021.014987 - 18 March 2021

    Abstract Date palm fiber (DPF) and kenaf fiber were reinforced in epoxy having various fiber loading 40%, 50%, and 60% by weight. These hybrid samples were manufactured by hot press technique and then characterized for tensile, impact, and morphological behavior to evaluate the ratio of fibers in the hybrid composites; the addition of kenaf improved the tensile properties, Scanning Electron Microscopy (SEM) revealed the interfacial bonding of fiber/matrix, and dispersion and void content in composites. Impact test studies reflected the effect of natural fiber with epoxy, level of stress transfer from matrix to reinforced material, and More > Graphic Abstract

    Fiber Loading of Date Palm and Kenaf Reinforced Epoxy Composites: Tensile, Impact and Morphological Properties

  • Open Access

    ARTICLE

    Hydrogenated Amorphous Carbon Films from Palmyra Sugar

    Budhi Priyanto1,2,*, Retno Asih1, Irma Septi Ardiani1, Anna Zakiyatul Laila1, Khoirotun Nadiyyah1, Bima Romadhon3, Sarayut Tunmee4, Hideki Nakajima4, Triwikantoro1, Yoyok Cahyono1, Darminto1,*

    Journal of Renewable Materials, Vol.9, No.6, pp. 1087-1098, 2021, DOI:10.32604/jrm.2021.014466 - 11 March 2021

    Abstract A simple, highly reproducible, and environmentally friendly method is a considered approach in generating renewable energy materials. Here, hydrogenated amorphous carbon (a-C) films have been successfully prepared from palmyra liquid sugar, employing spin-coating and spraying methods. Compared with the former method, the latter shows a significance in producing a better homogeneity in particle size and film thickness. The obtained films have a thickness of approximately 1000 to 100 nm and contain an sp2 hexagonal structure (~70%) and sp3 tetrahedral configuration (~30%) of carbons. The introduction of boron (B) and nitrogen (N) as dopants has created the local More > Graphic Abstract

    Hydrogenated Amorphous Carbon Films from Palmyra Sugar

  • Open Access

    ARTICLE

    Function of Palm Fiber in Stabilization of Alluvial Clayey Soil in Yangtze River Estuary

    Jili Qu*, Hao Zhu*

    Journal of Renewable Materials, Vol.9, No.4, pp. 767-787, 2021, DOI:10.32604/jrm.2021.013816 - 01 February 2021

    Abstract Palm fiber is one of the favorable materials used in stabilization of soft soil in geotechnical engineering projects in recent years due to its nature of sustainability, no harm to the environment, biodegradability, availability and cost-effectiveness in the context of widespread appeal from the world for returning to nature and protecting the earth our homestead. This paper is aimed at exploring the mechanical performance of Shanghai clayey soil reinforced with palm fiber. The unconfined compressive tests are carried out on samples treated with palm fibers of different lengths and contents, and the unconfined compressive strength… More >

  • Open Access

    ARTICLE

    Manufacturing Process Selection of “Green” Oil Palm Natural Fiber Reinforced Polyurethane Composites Using Hybrid TEA Criteria Requirement and AHP Method for Automotive Crash Box

    N. S. B. Yusof1,2, S. M. Sapuan1,3,*, M. T. H. Sultan1,4, M. Jawaid1

    Journal of Renewable Materials, Vol.8, No.6, pp. 647-660, 2020, DOI:10.32604/jrm.2020.08309 - 12 May 2020

    Abstract In this study, the best manufacturing process will be selected to build an automotive crash box using green oil palm natural fibre-reinforced polyurethane composite materials. This paper introduces an approach consist of technical aspects (T), the economic point of view (E) and availability (A), and it’s also called as TEA requirement. This approach was developed with the goal of assisting the design engineer in the selection of the best manufacturing process during the design phase at the criteria selection stage. In this study, the TEA requirement will integrate with the analytical hierarchy process (AHP) to… More >

  • Open Access

    ARTICLE

    Reference Gene Selection for Quantitative Real-Time PCR Analyses of Acer palmatum under Abiotic Stress

    Lu Zhu, Qiuyue Ma, Shushun Li, Jing Wen, Kunyuan Yan, Qianzhong Li*

    Phyton-International Journal of Experimental Botany, Vol.89, No.2, pp. 385-403, 2020, DOI:10.32604/phyton.2020.09259 - 22 April 2020

    Abstract Quantitative real-time reverse transcriptase PCR (qRT-PCR) technology has been extensively used to estimate gene expression levels, and the selection of appropriate reference genes for qRT-PCR analysis is critically important for obtaining authentic normalized data. Acer palmatum is an important colorful leaf ornamental tree species, and reference genes suitable for normalization of the qRT-PCR data obtained from this species have not been investigated. In this study, the expression stability of ten candidate reference genes, namely, Actin3, Actin6, Actin9, EF1α, PP2A, SAMDC, TIP41, TUBα, TUBβ and UBQ10, in two distinct tissues (leaves and roots) of A. palmatum under four different abiotic stress conditions (cold,… More >

  • Open Access

    ARTICLE

    Tentative Identification of Phytochemicals and Antioxidant Activities during Fruit-Ripening on Chamaedorea radicalis Mart.

    Gerardo Montelongo-Ruíz1, Yolanda del Rocio Moreno-Ramírez1, María Cruz Juárez-Aragón1, Nohemí Niño-García2, Reyna Ivonne Torres-Acosta2, Torres-Castillo Jorge Ariel1,*

    Phyton-International Journal of Experimental Botany, Vol.89, No.2, pp. 361-373, 2020, DOI:10.32604/phyton.2020.08499 - 22 April 2020

    Abstract This work aims to determine the phytochemical characterization of the pericarp of Chamaedorea radicalis Mart. fruit as a non-timber product with potential to obtain phytochemicals with potential applications in the industry. Fruit from C. radicalis were grouped in four ripening stages named as S1, S2, S3 and S4, according to maturity; S1 the most unripe stage and S4 the completely ripe stage. Determinations of total phenolic compounds, free radical scavenging activities and total flavonoid contents using spectrophotometric methods were done. Also, the tentative identification of phytochemicals during fruit ripening was done using UPLC-MS-MS. Total phenolic compound (TPC)… More >

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